Chart correction 4727 — chart 47

Chart 47 [ previous update 4030/23 ] NAD83 DATUM Insert the accompanying note, AUTOMATIC IDENTIFICATION SYSTEMS, centred on: 47° 32´·55N., 122° 20´·65W.

Source: UKHO Admiralty Notices to Mariners

Reference information — always verify against official Notices to Mariners before navigation.